U.S. Patent 7,137,406
A screw-in, cartridge-style, pilot-operated, two-stage, spool-type hydraulic relief valve, intended for use as a pressure limiting device in demanding hydraulic circuits which require fast response and low hysteresis.
The RV16-26 blocks flow from 1 to 2 until sufficient pressure is present at 1 to force the pilot relief off its seat, allowing the main stage to shift, opening 1 to 2. The cartridge offers smooth transition in response to load changes in demanding hydraulic circuits
Note: The RV16-26 cannot be used in cross-over relief applications.
• Adjustments cannot be backed out of the valve.
• Adjustments prohibit springs from going solid.
• Hardened spool and cage for long life.
• Optional spring ranges to 275.8 bar (4000 psi).
• Rapid, smooth response to pressure surges.
Operating Pressure: 275.8 bar (4000 psi) maximum
Flow: up to 303 lpm (80 gpm)
Internal Leakage: 115 cc/minute (7 cu. in./minute) maximum for pressure settings below
138 bar (2000 psi); 197 cc/minute (30 cu. in./minute) maximum for pressure settings
of 138 bar (2000 psi) or higher. Leakage measured at 85% of nominal setting
Crack Pressure Defined: bar (psi) evident at 7.6 lpm (2.0 gpm) attained
Reseat Pressure: Nominal 90% of crack pressure
Standard Spring Ranges: Model Code 03: 9.66–20.70 bar (140–300 psi);
Model Code 06: 15.87–41.41 bar (230–600 psi);
Model Code 15: 36.63–103.52 bar (530–1500 psi);
Model Code 35: 82.82–241.55 bar (1200– 3500 psi)
Temperature: -40° to 100°C (-40° to 212°F) with Buna seals;
-26° to 204°C (-15° to 400°F) with Fluorocarbon seals;
-54° to 107°C (-65°F to 225°F) with Polyurethane seals
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of
7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1
Cavity: VC16-2; See page 9.116_2w
Cavity Tool: CT16-2xx; See page 8.600.1
Seal Kit: SK16-2x-B; See page 8.650.1